2 * adv7175 - adv7175a video encoder driver version 0.0.3
4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
6 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
7 * - some corrections for Pinnacle Systems Inc. DC10plus card.
9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/ioctl.h>
30 #include <asm/uaccess.h>
31 #include <linux/i2c.h>
32 #include <linux/i2c-id.h>
33 #include <linux/videodev2.h>
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-chip-ident.h>
36 #include <media/v4l2-i2c-drv-legacy.h>
38 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
39 MODULE_AUTHOR("Dave Perks");
40 MODULE_LICENSE("GPL");
42 #define I2C_ADV7175 0xd4
43 #define I2C_ADV7176 0x54
45 static unsigned short normal_i2c[] = {
46 I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
47 I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
54 module_param(debug, int, 0);
55 MODULE_PARM_DESC(debug, "Debug level (0-1)");
57 /* ----------------------------------------------------------------------- */
60 struct v4l2_subdev sd;
65 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
67 return container_of(sd, struct adv7175, sd);
70 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
72 /* ----------------------------------------------------------------------- */
74 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
76 struct i2c_client *client = v4l2_get_subdevdata(sd);
78 return i2c_smbus_write_byte_data(client, reg, value);
81 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
83 struct i2c_client *client = v4l2_get_subdevdata(sd);
85 return i2c_smbus_read_byte_data(client, reg);
88 static int adv7175_write_block(struct v4l2_subdev *sd,
89 const u8 *data, unsigned int len)
91 struct i2c_client *client = v4l2_get_subdevdata(sd);
95 /* the adv7175 has an autoincrement function, use it if
96 * the adapter understands raw I2C */
97 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
98 /* do raw I2C, not smbus compatible */
104 block_data[block_len++] = reg = data[0];
106 block_data[block_len++] = data[1];
110 } while (len >= 2 && data[0] == reg && block_len < 32);
111 ret = i2c_master_send(client, block_data, block_len);
116 /* do some slow I2C emulation kind of thing */
119 ret = adv7175_write(sd, reg, *data++);
129 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
131 /* for some reason pass_through NTSC needs
132 * a different sub-carrier freq to remain stable. */
134 adv7175_write(sd, 0x02, 0x00);
136 adv7175_write(sd, 0x02, 0x55);
138 adv7175_write(sd, 0x03, 0x55);
139 adv7175_write(sd, 0x04, 0x55);
140 adv7175_write(sd, 0x05, 0x25);
143 /* ----------------------------------------------------------------------- */
144 /* Output filter: S-Video Composite */
146 #define MR050 0x11 /* 0x09 */
147 #define MR060 0x14 /* 0x0c */
149 /* ----------------------------------------------------------------------- */
157 static const unsigned char init_common[] = {
159 0x00, MR050, /* MR0, PAL enabled */
160 0x01, 0x00, /* MR1 */
161 0x02, 0x0c, /* subc. freq. */
162 0x03, 0x8c, /* subc. freq. */
163 0x04, 0x79, /* subc. freq. */
164 0x05, 0x26, /* subc. freq. */
165 0x06, 0x40, /* subc. phase */
167 0x07, TR0MODE, /* TR0, 16bit */
172 0x0c, TR1CAPT, /* TR1 */
173 0x0d, 0x4f, /* MR2 */
180 static const unsigned char init_pal[] = {
181 0x00, MR050, /* MR0, PAL enabled */
182 0x01, 0x00, /* MR1 */
183 0x02, 0x0c, /* subc. freq. */
184 0x03, 0x8c, /* subc. freq. */
185 0x04, 0x79, /* subc. freq. */
186 0x05, 0x26, /* subc. freq. */
187 0x06, 0x40, /* subc. phase */
190 static const unsigned char init_ntsc[] = {
191 0x00, MR060, /* MR0, NTSC enabled */
192 0x01, 0x00, /* MR1 */
193 0x02, 0x55, /* subc. freq. */
194 0x03, 0x55, /* subc. freq. */
195 0x04, 0x55, /* subc. freq. */
196 0x05, 0x25, /* subc. freq. */
197 0x06, 0x1a, /* subc. phase */
200 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
202 /* This is just for testing!!! */
203 adv7175_write_block(sd, init_common, sizeof(init_common));
204 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
205 adv7175_write(sd, 0x07, TR0MODE);
209 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
211 struct adv7175 *encoder = to_adv7175(sd);
213 if (std & V4L2_STD_NTSC) {
214 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
215 if (encoder->input == 0)
216 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
217 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
218 adv7175_write(sd, 0x07, TR0MODE);
219 } else if (std & V4L2_STD_PAL) {
220 adv7175_write_block(sd, init_pal, sizeof(init_pal));
221 if (encoder->input == 0)
222 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
223 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
224 adv7175_write(sd, 0x07, TR0MODE);
225 } else if (std & V4L2_STD_SECAM) {
226 /* This is an attempt to convert
227 * SECAM->PAL (typically it does not work
228 * due to genlock: when decoder is in SECAM
229 * and encoder in in PAL the subcarrier can
230 * not be syncronized with horizontal
232 adv7175_write_block(sd, init_pal, sizeof(init_pal));
233 if (encoder->input == 0)
234 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
235 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
236 adv7175_write(sd, 0x07, TR0MODE);
238 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", std);
241 v4l2_dbg(1, debug, sd, "switched to %llx\n", std);
246 static int adv7175_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
248 struct adv7175 *encoder = to_adv7175(sd);
250 /* RJ: route->input = 0: input is from decoder
251 route->input = 1: input is from ZR36060
252 route->input = 2: color bar */
254 switch (route->input) {
256 adv7175_write(sd, 0x01, 0x00);
258 if (encoder->norm & V4L2_STD_NTSC)
259 set_subcarrier_freq(sd, 1);
261 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
262 if (encoder->norm & V4L2_STD_SECAM)
263 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
265 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
266 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
267 adv7175_write(sd, 0x07, TR0MODE);
272 adv7175_write(sd, 0x01, 0x00);
274 if (encoder->norm & V4L2_STD_NTSC)
275 set_subcarrier_freq(sd, 0);
277 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
278 adv7175_write(sd, 0x0d, 0x49);
279 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
280 adv7175_write(sd, 0x07, TR0MODE);
285 adv7175_write(sd, 0x01, 0x80);
287 if (encoder->norm & V4L2_STD_NTSC)
288 set_subcarrier_freq(sd, 0);
290 adv7175_write(sd, 0x0d, 0x49);
291 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
292 adv7175_write(sd, 0x07, TR0MODE);
297 v4l2_dbg(1, debug, sd, "illegal input: %d\n", route->input);
300 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[route->input]);
301 encoder->input = route->input;
305 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
307 struct i2c_client *client = v4l2_get_subdevdata(sd);
309 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
312 static int adv7175_command(struct i2c_client *client, unsigned cmd, void *arg)
314 return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
317 /* ----------------------------------------------------------------------- */
319 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
320 .g_chip_ident = adv7175_g_chip_ident,
321 .init = adv7175_init,
324 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
325 .s_std_output = adv7175_s_std_output,
326 .s_routing = adv7175_s_routing,
329 static const struct v4l2_subdev_ops adv7175_ops = {
330 .core = &adv7175_core_ops,
331 .video = &adv7175_video_ops,
334 /* ----------------------------------------------------------------------- */
336 static int adv7175_probe(struct i2c_client *client,
337 const struct i2c_device_id *id)
340 struct adv7175 *encoder;
341 struct v4l2_subdev *sd;
343 /* Check if the adapter supports the needed features */
344 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
347 v4l_info(client, "chip found @ 0x%x (%s)\n",
348 client->addr << 1, client->adapter->name);
350 encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
354 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
355 encoder->norm = V4L2_STD_NTSC;
358 i = adv7175_write_block(sd, init_common, sizeof(init_common));
360 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
361 i = adv7175_write(sd, 0x07, TR0MODE);
362 i = adv7175_read(sd, 0x12);
363 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
366 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
370 static int adv7175_remove(struct i2c_client *client)
372 struct v4l2_subdev *sd = i2c_get_clientdata(client);
374 v4l2_device_unregister_subdev(sd);
375 kfree(to_adv7175(sd));
379 /* ----------------------------------------------------------------------- */
381 static const struct i2c_device_id adv7175_id[] = {
386 MODULE_DEVICE_TABLE(i2c, adv7175_id);
388 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
390 .driverid = I2C_DRIVERID_ADV7175,
391 .command = adv7175_command,
392 .probe = adv7175_probe,
393 .remove = adv7175_remove,
394 .id_table = adv7175_id,